Rheumatoid bursitis, right knee

This code signifies inflammation of the bursa (a fluid-filled sac that cushions joints) in the right knee, specifically caused by rheumatoid arthritis. This condition typically presents with pain, swelling, and tenderness in the affected knee. It is a manifestation of systemic rheumatoid disease.

Use this code when documentation clearly indicates bursitis of the right knee in a patient diagnosed with rheumatoid arthritis. The physician's notes should specify the laterality (right knee) and link the bursitis to the underlying rheumatoid condition. This code is appropriate for both acute and chronic presentations of rheumatoid bursitis.

• Ensure the documentation explicitly states "rheumatoid" bursitis to differentiate from other causes of bursitis.
• Verify laterality; separate codes exist for the left knee and unspecified knee.
• Code the underlying rheumatoid arthritis condition first, as it is the etiology of the bursitis.